// gorpc/client/service/calc_service.go

package service

type CalcService interface {
	Add(a, b int) (int, error)
	Sub(a, b int) (int, error)
	Mul(a, b int) (int, error)
	Div(a, b int) (int, error)
	Mod(a, b int) (int, error)
}
